Sectional-boiler.



No. 724,373. PMIE'NTED MAR. 3.1, 190s.

' J.'L. ARMITAGB a; A. PINNEY.

SBCTIONAL BML-ER.

l APPLIOATION FILED Nov. 1o, .1992. Ko MODEL. 4 SHEETS-SHEET 1.

No. 724,373. @PATENTED MAR. 31, 1903. J. L.' ARVMITAGE a.. A. PINNEY. SEGTIONAL BOILBR.

APPLICATION FILED NOV. 10l 1902.

NO MODEL. 4 SHEETS-SHEET 2.

No. 724,373. Y PATENTEQD MAR. s1, 1`9o3 J. L. ARMITAGB & A. PINNEY. SEGTIONAL BOILER.v IIIIIIIIIIIIIIIII ov,1o, 1902.

EEEEEEEEEEEEE 3.

NO MODEL.

No. 724,373. 4P. \.IBNTFDv MAR. 31, 1908.

J. L. ARMITAGE L A. PINNEY. SEGTIONAL BOILER.

APPLICATION FILED NOV. 10, 1902. a A` No MODEL. 4 sHBET-'SHBET 4.

UNITED STATES PATENT OFFICE.

-JoIIN L. ARMITAGE, on NEW KENSINGTON, AND ADAMHPINNEY, oE ALLEGHENY, PENNSYLVANIA;` SAID PINNEY ASSIcNoE To SAID ARMITAGE.

SECTIONALBOILER.

vSPEGIIFIGATIOIY.' forming part of Letters Patent No.' 724,373, dated March 31, 1903.

' Application tiled November 10I 1902. Serial No. 130,793. (No moileLl To all whom it may concern:

Be it known that we, JOHN L. AEMITAGE, residing at New Kensington, in the county of Westmoreland, and ADAM PINNEY, residing at Allegheny, in the county of Allegheny, State of Pennsylvania, citizens of the United States, have invented a new and useful SectionalBoiler, of which the following is a specication.

The invention relates to certain improvements in cast-iron sectional boilers of that class employed in connection with hot-water or low-pressure heating systems.

One object of the invention is to provide a boiler of this character in which an extensive surface will be exposed to the products of combustion and in which a free and continuous circulation of water may be maintained between the several sections constituting the boiler.

A further object of the invention is to provide a form of sectional boiler in which the number of special castings is V'reduced to a minimum and in which any desired number of sections maybe assembled to form a boiler of any desired capacity.

A further object of the invention is to so construct each of the sections as to provide, when a number of sections are assembled, for the formation of tortuous ues or passages by which the iiame and gaseous products of combustion may be made toimpinge on an extensive heating-surface, and, further, to so construct the sections that the surface against which the flame impinges, while offering the greatest possible area, will not retard or check the passage of the products of combustion to any material extent.

A still further object of the invention is to provide a boilei of this class in which each section is provided with a separate flue for the escape of the products of combustion, thus evenly distributing theV heat throughout the boiler without regard to the number of sections of which it is formed and permitting the assemblement of any desired number of sections without alteration in the size of the escape-fine.

Astill further object of the invention is to 5o provide a sectional boiler in which each secinvention consists in the novel construction and arrangement of parts hereinafter described,illustrated in the accompanying'drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, Figure lis a longitudinal sectional elevation of a sectional steam-boiler constructed in accordance with the invention. Figs. 2 and 3 are transverse sectional elevations of the same on the lines 2 2 and 3 3, respectively, of Fig. 1. Fig. 4 is a detail perspective View of one of the sections detached. Fig. 5 is a front elevation of the boiler, illustrating the general arrangement of the flue and iire-board. Fig. 6 is a planview, partly in section, on the line 6 6 of Fig. 1. Fig. 7 is a View similar to Fig. 6, the section being taken on the line 7 7 of Fig. 1. Fig. S is a perspective view of upper rear portion of one of the sections.

Similar numerals of reference are employed to Aindicate corresponding parts throughout the several figures of the drawings.

The boilersections are each'of the construction illustratedin Fig. 4, comprising vertically-disposed Water-legs 10, vunited by a num-- ber of transverse connections, (indicated at 1l, 12, 13, 14, and 15,) the latter forming a steamdome. Each of the members when viewed in cross-section has'a fiat face 16, which in the leg members is outermost and in the horizontal members uppermost, `and each has also an opposite Wall or face arranged in the'formpf a double-ogee curve to form an extensive heating-surface for contact with the products ,of combustion.

In the opposite sides of the members 11 and 13 at points near each end thereof are recesses 16 of semi-elliptical form-'and when the sec-I IOO tions are assembled together these recesses form elliptical flues for the passage of the products of combustion. The members '12 and 14 of each section are provided on opposite sides with centrally-disposed recesses 17, each of an area approximately equal to the sum of the areas of two of the recesses 16 and the several recessesforming continuous tortuous ilues, through which the products of combustion are directed, as indicated by the arrows in Fig. 1.

The several flue-forming recesses are made by reducing the width of the water-space of the several horizontal members of each section; but this is accomplished without materially interfering with the free circulation of water through said members, while the peculiar shape of the fiame-impinging surfaces is such as to present a very extensive heating area without materially checking the passage of the products of combustion.

After making contact with the lower surface of the upper member 15 of each section the products of combustion are directed to escape-fines 18, a portion of each flue being formed by recessing the adjacent walls of the sections, and thence to a drum 19, preferably i formed of a separate casting bolted to each section and in communication with the dues 18, there being as many drum-sections as there are boiler-sections and all of the drumsections being provided with bolting-fianges to permit the assemblementof any desired number of sections and the formation of a continuous drum into.which the products of combustion are directed. By this arrangement the number of sections may be increased or diminished to form a boiler of any desired capacity, and each section will receive or be subjected to the action of precisely the same number of heat units from the fuel on the grate. The construction further permits freer drafts and the better absorption of heat by the water than in section-boilers of that class where a number of continuous horizontal flues are formed by arranging a plurality of sections together, the length of the hues being increased in proportion to the number of sections and the dierent sections being thus subjected to different degrees of heat. The construction f urther per-mits of the assemblement of an indefinite number of sections, and the siz'e of any plant may be readily altered with but little trouble and expense by the addition of a few grate-bars and a number of additional sections without rendering it necessary to practically dismantle the boiler.

The sections are connected to each other at three points-that is to say, at the top of the members 15 and at the bottom of each water-leg-by the formation of alining openings 21, through which are passed push-nipples 22, the nipples and sections being held in place by continuous bars extending from end to end of the boiler through the alining openings and nipples, or by suitable securing-bolts separately connecting each section to the tw adjacent sections, or, if desired, the manifold connection usually employed in sectional boilers may be employed to connect the several sections.

The end members or sections are somewhat narrower than the intermediate sections and at one side are provided with integral solid plates in order to prevent any escape of the products of combustion, while the inner sides of each of the end sections are provided with the due-recesses 1G and 17, mating with the similar flue-sections of the next adjacent members of the boiler.

The fire-doors are preferably so arranged as to extend `over a part of two adjacent sections, the water-legs being recessed at 25, as illustrated in Fig. 4, and two of such recesses forming when assembled an opening of sufficient size for firing purposes, while the recesses do not extend completely across the water-legs in order to permit the circulation of water throughout the entire length of each leg. The ring-openings are closed by suitable doors 26, hinged to lugs projecting from a door-frame 27, bolted to the boiler-sections.

At the front of each section the vertical members are provided with side recesses 27 in alinement with the several hue-passages between the members 11, 12, 13, 14:, and 15, and these recesses permit the introduction of cleaning-tools or flue-scraping devices when it becomes necessary to remove accumulations from the tops of the several horizontal members of each section. A separate door may be provided for each of these cleaninga openings; but it is preferred to employa front plate 30, having large doors 31, which will cover a number of the openings.

The supporting-base, ash-pit, and grate may be of any desired construction, While the ashpit door is preferably of the form illustrated in Figs. 1 'and 5, comprising a hap-door 32, carrying an auxiliary hinged door 33 in order to more accurately control the draft.

Having thus described the invention, what is claimed is- 1. The combination in a boiler, of a plurality of sections each having front waterlegs, the water-legs of adjacent sections being recessed to form a firing-opening.

2. The combination in a boiler, of a plurality of sections each having front and rear' water-legs, the front legs of adjacent sections being recessed to lform a tire-door opening, and a door for covering said opening.

3. A boiler-section comprising a-front and a rear water-leg, a plurality of horizontal members connecting the front and rear legs and recessed to form ues,the lower faces of said members having double-ogee shape to form flame-deecting surfaces.

4. A boiler-section comprising front and rear water-legs and a plurality of horizontal members connecting the legs, said members having side recesses arranged in dierent vertical planes to form a tortuous passage,

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land an escape-nue forming a part of each section and in communicationwith said passage.

V5. A boiler-section comprising front and rear legs, a plurality of horizontally-disposed members connecting the legs and arranged to form passages or nues, and an independent escape flue or pipe section connected to` each boiler-section.

6. The combination in a boiler; of a plu# rality of sections each comprising front and rear Water-legs and a plurality of horizontal members; the horiz'ontal members of adjacent JOHN L. ARMITAGE; ADAM PINNEr Witnesses l W. F. CRAWFORD, HENRY MEYER. 

